No Code Acceleration Hesitation - Any Ideas? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

PaulsSS · 11-12-2023, 12:08 AM

how old is the battery?

StupidBmblB · 11-12-2023, 09:25 PM

The saga continues. It appears after further review there was some tune data in the computer that wasn’t factory. Of course I hoped that that resetting to a factory tune would fix the hesitation/bucking but it didn’t. The mechanic said it does seem to be helping overall, but not fixing the problem. The MAF data still seems to be culprit, a new one was tried just in case as well. The throttle body was cleaned, and some minor realignment on the ducting for the air intake. The battery is now new, and the work done to improve the battery connections seems to have helped the entire 12v system. But none of that has fixed the hesitation.

Back to the drawing board!

acutron42 · 11-13-2023, 05:40 AM

Can you post a pic of the cold air intake? All I can suggest is inspecting the maf wiring & circuit. Without seeing more comprehensive data in the log it is just a guessing game.

StupidBmblB · 12-15-2023, 06:57 PM

So the saga seems to have ended. And I truly appreciate those that offered some ideas. We ended up replacing the ECM and it’s run great over the past 3 days and about 45-50 miles. With the prior battery not being seated in the harness correctly it looks like it was making contact with the top support bar amongst other issues with what they had going on. After he replaced the battery he was getting much better readings on all of the sensors, and then it was just a matter of working back to the ECM which the theory is the bad voltage may have done something to it.

I’m a little gun shy to declare victory, but the first few days have been great.

Infidel67 · 12-16-2023, 10:05 AM

Glad you got it taken care off.

11-13-2023, 05:40 AM	#17
acutron42 Drives: 2013 Camaro 2SS AGM Join Date: Apr 2020 Location: WNY Posts: 733	Can you post a pic of the cold air intake? All I can suggest is inspecting the maf wiring & circuit. Without seeing more comprehensive data in the log it is just a guessing game. __________________ 2013 2SS GPI built & tuned 415, spec'd by Andrew Cammer. GPI ported intake/tb/heads, Tooley springs, CHE trunnions, Callies rotating assembly, Diamond pistons, GPI SS3 VVT, ATI 10% ud damper, Circle D 3800, Kooks ceramic coated lt's with green cats, Mishimoto rad & oil cooler, Derale trans cooler, Holley efi rails.

12-16-2023, 10:05 AM	#19
Infidel67 Life's just a Ride Drives: 2011 Synergy Camaro 2SS/RS LS3 Join Date: Oct 2013 Location: Columbia SC Posts: 854 View My Garage	Glad you got it taken care off. __________________ 2011 Synergy Camaro 2SS/RS Ls3, LTH, CAI Custom Intake, TSP stage-3 111-LSA Cam, RWHP 503/508

11-12-2023, 12:08 AM	#15
PaulsSS Drives: 15SS Camaro Join Date: Dec 2020 Location: US Posts: 346	how old is the battery?

11-12-2023, 09:25 PM	#16
StupidBmblB Drives: 2011 Chevy Camaro SS Join Date: Sep 2023 Location: Colorado Posts: 11	The saga continues. It appears after further review there was some tune data in the computer that wasn’t factory. Of course I hoped that that resetting to a factory tune would fix the hesitation/bucking but it didn’t. The mechanic said it does seem to be helping overall, but not fixing the problem. The MAF data still seems to be culprit, a new one was tried just in case as well. The throttle body was cleaned, and some minor realignment on the ducting for the air intake. The battery is now new, and the work done to improve the battery connections seems to have helped the entire 12v system. But none of that has fixed the hesitation. Back to the drawing board!

12-15-2023, 06:57 PM	#18
StupidBmblB Drives: 2011 Chevy Camaro SS Join Date: Sep 2023 Location: Colorado Posts: 11	So the saga seems to have ended. And I truly appreciate those that offered some ideas. We ended up replacing the ECM and it’s run great over the past 3 days and about 45-50 miles. With the prior battery not being seated in the harness correctly it looks like it was making contact with the top support bar amongst other issues with what they had going on. After he replaced the battery he was getting much better readings on all of the sensors, and then it was just a matter of working back to the ECM which the theory is the bad voltage may have done something to it. I’m a little gun shy to declare victory, but the first few days have been great.